I have a square wave, 2 V amplitude, 500 microsecond period. I found its fundamental frequency as 2000Hz (I think!). Now, since a square wave with unit amplitude of 1 V has the amplitude of its first harmonic as 4/pi V, can i assume that a 2 V amplitude wave has 8/pi as the amplitude of its first harmonic? The amplitude of the 3rd harmonic is therefore (1/3)(8/pi) V? Hence the frequency of the 3rd non-zero harmonic will be 5(fundamental frequency)=10 kHz?

Thank you for your attention